CD74HCT4520MG4 [Texas Instruments]

Each device consists of two independent internally synchronous 4-stage counters. The counter stages are D-type flip-flops. Features include interchangeable CLOCK and ENABLE lines for incrementing on either the positive-going or the negative-going transition of CLOCK, cleared by high levels on the MASTER RESET lines, and cascadable in ripple mode. Synchronous Internal Carry Propagation. Fanout (Over Temperature Range): Standard Outputs: 10 LSTTL Loads, Bus Driver Outputs: 15 LSTTL Loads. Wide Operating Temperature Range: -55°C to 125°C. Balanced Propagation Delay and Transition Times. Significant Power Reduction Compared to LSTTL. HC Types: 2V to 6V Operation, High Noise Immunity: NIL = 30%, NIH = 30% of VCC. HCT Types: 4.5V to 5.5V Operation, Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min), CMOS Input Compatibility, Il ≤1µA at VOL, VOH.